Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

11. Controlling Microbial Growth

Physical Methods to Control Microbial Growth

Microbiology

11. Controlling Microbial Growth

Physical Methods to Control Microbial Growth

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Multiple Choice

How does irradiation control microbial growth?

Some types of radiation can create lethal amounts of heat.

Radiation penetrates cells causing damage to DNA and cell membranes.

Radiation creates reactive oxygen species which damage cellular processes.

All of the above are ways that irradiation controls microbial growth.

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Verified step by step guidance

Understand that irradiation refers to the use of radiation to kill or inhibit the growth of microorganisms.

Recognize that different types of radiation, such as ultraviolet (UV) light, gamma rays, and X-rays, can be used for microbial control.

Consider how radiation can cause direct damage to microbial DNA, leading to mutations or cell death, which prevents the microorganism from reproducing.

Acknowledge that radiation can also generate heat, which can denature proteins and disrupt cellular structures, contributing to microbial death.

Realize that radiation can produce reactive oxygen species (ROS), which are highly reactive molecules that can damage cellular components such as lipids, proteins, and nucleic acids, further inhibiting microbial growth.